基于城镇化视角的省域粮食安全研究——以江苏省为例

以城镇化为视角,探讨了城镇化发展与粮食安全的关系。将城镇化细分为人口、土地、经济和消费四个方面,构建城镇化发展评价指标,采用熵权法与多元回归相结合的方法,对江苏省2001-2012年的数据进行了实证分析,结果表明经济城镇化与人口城镇化对粮食安全具有促进作用,而土地城镇化与消费城镇化对粮食安全具有不同程度的负面作用,特别是土地城镇化负面作用较为明显。因此,对稀缺土地的科学使用显得至关重要。城镇化与粮食安全的分析结果更加表明,合理的制度安排是确保二者协同发展的重要保障。通过偏向农业的制度安排,合理控制土地使用,引导居民消费习惯,促进城镇化平衡发展,就不会出现大的粮食安全隐患。     

某任务管理计算机航电系统测试与研究

为了解决某机载任务管理计算机航电系统测试设备对故障的快速定位及故障诊断、隔离问题,对机载计算机航电测试设备的系统结构、硬件、软件进行了分析,阐述了系统测试设备的设计思想及实现方法,最后通过对机载任务管理计算机各模块故障模拟、数据分析,对测试系统设备进行了评价,验证了某机载任务管理计算机测试设备设计的合理性和可靠性,为机载计算机测试系统设计、研发、故障隔离诊断提供借鉴和参考。     

一般企业消防系统简介

本文介绍了一般企业中最常见的消防系统的构成和工作原理,包括火灾自动报警系统、火灾探测器的种类、自动喷水灭火系统、消火栓系统和消防控制室等。     

Provider fairness across continents in collaborative recommender systems

When a recommender system suggests items to the end-users, it gives a certain exposure to the providers behind the recommended items. Indeed, the system offers a possibility to the items of those providers of being reached and consumed by the end-users. Hence, according to how recommendation lists are shaped, the experience of under-recommended providers in online platforms can be affected. To study this phenomenon, we focus on movie and book recommendation and enrich two datasets with the continent of production of an item. We use this data to characterize imbalances in the distribution of the user–item observations and regarding where items are produced (geographic imbalance). To assess if recommender systems generate a disparate impact and (dis)advantage a group, we divide items into groups, based on their continent of production, and characterize how represented is each group in the data. Then, we run state-of-the-art recommender systems and measure the visibility and exposure given to each group. We observe disparities that favor the most represented groups. We overcome these phenomena by introducing equity with a re-ranking approach that regulates the share of recommendations given to the items produced in a continent (visibility) and the positions in which items are ranked in the recommendation list (exposure), with a negligible loss in effectiveness, thus controlling fairness of providers coming from different continents. A comparison with the state of the art shows that our approach can provide more equity for providers, both in terms of visibility and of exposure.     

物联网基础的食品安全数据挖掘支撑平台的设计

物联网基础的食品安全信息网络存在数据量巨大、数据源异构的突出特点.通过建立和运行模拟系统,在数据源的基础上,提出建立具有共享概念统一规范的本体库、结合云计算技术作为数据挖掘的支撑平台,对提高食品信息的数据挖掘效率,解决食品安全信息的泛在查询和在预警、突发事件处理等方面提供决策支持.     

浅析食物词汇中的比喻词——以中韩例句为例

中文词汇中很多词通过比喻的方式可以产生许多不同的意思。有的丧失了其本来的意思,有的通过人、事、物外貌或特性的比喻可以更深层地把握其内在的一些东西。本文就是通过一些利用比喻而形成和食物相关的词汇来认识一下中韩词汇学习中的这种比喻方法。     

An empirical study on the determinants of essential patent claims in compatibility standards

In the field of compatibility standards, an increasing number of companies claim to own so-called essential patents (i.e. those patents that are indispensable for designing and manufacturing products conforming to the standard). It is widely believed that the ownership of such patents is a very valuable bargaining tool in cross-license negotiations, while for non-producing firms such patents may result in a substantial stream of licensing revenues. In this paper we study the determinants of essential patent claims in compatibility standards. In particular, we assess the role of two main factors: the significance of the technological solution contained in the patent and the involvement of the applicant of the patent in the standardisation process. We examine the case of W-CDMA, one of the most successful standards in mobile telecommunications. We compare the patents claimed essential for this standard with a control group of randomly selected, unclaimed patents covering the same time period and technology classes. We find empirical evidence that both factors have significant impact on the probability that a patent is claimed as essential, but the involvement in the standardisation process is a stronger determinant than the technical value (‘merit’) of the patent. On the basis of our findings, we offer policy recommendations.     

基于耗散与灰关联熵的RIS演化机制研究

 本文在论证区域创新系统(RIS)是一种耗散结构的基础上，以各评价创新能力的指标为序参量，来描述RIS的有序性和演化方向。应用耗散结构理论和灰色系统理论，把灰关联度和熵结合起来，以序参量为基础，建立了基于灰关联熵的RIS演化方向判别模型，并以黑龙江省为例对该模型的研究结果进行了验证，为RIS分析提供了一种崭新的研究思路。     

A novel controller design and evaluation for networked control systems with time-variant delays

A new delayed state-variable model for networked control systems is presented, upon which a linear quadratic regulator (LQR) is designed. A method of delays-estimation online is also given. A fuzzy logic with LQR controller is addressed for the difficulty on implementation of LQR in networked control systems (NCSs) with time-variant delays. Simulation results prove that the novel controller can make the system stable and robustly preserve the performance in terms of time-variant delays.